Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2519845932c2fbe68a9cfed5fcd725acf995cf0f68883793cf4a1c80ddb605c1' 
  AND token = 'UW52UyB3Cb5DFCkQZe5fH6sveKHYg1/rEOd71zmSfLU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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