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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '01ba42b77c9639b6c1ef91a8267f969029a528e66f907ed04c2126acd01d27a6' 
  AND token = '/zu0f2gWL1voPpS4jWfFeOeQkp4WAAC5tztJQa5jHRs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}