Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eda0ad627488168bf693df2a42afd8170067f43e36aa3a38d7fca912625474c9' 
  AND token = 'ad0VDbZ4iT5qcb+/tZdvPJinLIvV6QVjmpSxkwRabzU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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