Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '63abc9681d0f9bb030399b3ead6d73996c6a2f5a5efc67c9bb222496796e0928' 
  AND token = 'l7Sz3SH1ocpawyV+q/MKtabRuX/L6pbJ9Bj4C0bsjFo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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