Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b3c735b9ff0ed14ed088c5c3314b8c6e7ca71b296b77bb8357b7db801028d0db' 
  AND token = 'OfOJGyxn7nJCLFojtJybQ9hA0kogSONnFsOSmy3hUdg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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