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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '60dc6a52c965768bafbda821c72c51abf85d55d2cf7140273429ebb869defeff' 
  AND token = '0X/cE2yr1lAG9tKZ5aivO2ydAR2eBuq5tSBtdUJX1bE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}