Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3884bebc37ad175cc0adba55b967c25728845bd50817c0264bd2e1cb307d8a12' 
  AND token = 'kx4eznYKmnYPXWwO6IVaS5hBBYMlm+an3E16sQqg9BA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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