Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1f667663adb50182e18290836edc4295a662108e3a6cb6d59de8324048bda69a' 
  AND token = 'os6ofhd07MXyxMJVA1M+jmrKKqSOLTS+ahcFRECVcD8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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