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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'baf5178ac8be2d01b7fc39949c4db0e948734b9724664482c0e7b0efa8f907d6' 
  AND token = 'gou+Wd9lTiqiXGq45qGNDkYlEbHz+A7W9rPYcTu1CEA=' 
  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"
    }
  }
}