Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2c628df228af1da624cade086c966d99aab3de78ff2a0d3050cdc8563ae50e2c' 
  AND token = 'bQV2kScQPxcYmbmV/TxFbAElcA8M6mZHU0UvkEIsJd0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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