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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e1ad8aab3891a4d3a660c691f4810aba154ffc7b4c685946850603ed3d4f64c0' 
  AND token = 'qqsnO8vwtfn2qO2TrO5P5kBGORa5t57k9Q9F/O0EZxo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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