Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '38b0f6e38ddd8cf9127fc38935607ca32b685b5c40c1d438eac5c11a5a15854f' 
  AND token = '5PRi3Ryffz+h/Fg+kLKUEs2tLEX4mAQSaofxfTpJddQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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