Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b7cb458fe47290199f6eddd8b16f86f7c9100fe0aa588eb35c75010766ec3a5b' 
  AND token = 'YGozbZxor2HpLtLd7wHYPPuBbBRsNKkTgHi4QpiD0V8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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