Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c078713d9960d57f254efe7874fe3c17711377362515b88895b83288e817e4a1' 
  AND token = 'QLd6Y86CA7TngUGWCevy7VkKm9qdpo7R93ym5n0rFkw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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