Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '59e174703223baa3d88a333b012f10bc45a2c0e38f4e4640e37fe7a915af4bd1' 
  AND token = '7rjpZuF+h2WInmBubzbxeMRHcm2S7aefER4TmdTOHIY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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