Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'af16c44f658803998899d1c9ace62097500723a38893ac5e9ae3eccf2fe077b1' 
  AND token = 'b4RqAYWKFrDXx2gkQa5ihmAO/YFJcvLm4jkXo3asdlY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}