Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0c2a784e33481ea63a440fd0dee2f188ba91d145d72c58d986ac90cf8f007560' 
  AND token = 's4aXBWxPdBxvaaB/SIpVVO4lrnex3X3FZ9ZHvNtTDuo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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