Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e435da7100eea3f339f89f46fa9792eb59f6f7db3585e8e2acd3d260643f6e7d' 
  AND token = 'i7J2uwVAFmdByEZQ3YpSa1LqZIkuYHSlOWtST/pI8As=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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