Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5ff70fa38d8c1ab3e34e32edbca857a2dd7a4b97b43d62f8d6eb5913f02a5e9e' 
  AND token = 'sJIQFDofM7yaVrYGbVG03QW3BZu7OG6ISnT1GZPRR/4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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