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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c60e0822c525a8db8bde544b8edc823f79a5663cdaa4d932ac70e3171aca2079' 
  AND token = 'HMaBUGSAkwamzTHQ9Xw0XVu1V9LCfHT7os8AQ0Fxcxo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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