Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1e3f686ebef38d7fd1d6203d6c0dd3762c908ce8eb257951e8c429603751d086' 
  AND token = 'BLlA7bvfnP21D6Jzarvy0vHzBP7jwgyS5t5ThgGbv5U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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