Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '699f1eb253172addb134c74ca4f3c39dab29d0036951e43ba3d74f9e64195117' 
  AND token = '8OQKkuoPlb2es3NMK50utWRaQdqt6hlqlmq6dERBvVw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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