Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e69a0b7081a68475e048ee9caf394430b90761e37d19a0aecc370a1ff7203761' 
  AND token = 'Um0rGlCQJe8gHIwT+Iqc2L4Rn6ywG2jE/SiJceYRhk8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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