Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e3c810e32856f01b2e155554f59adb478612ef0740dc1b1c4ec325962ce75169' 
  AND token = 'Y4/RxXr5NOO1nGpDWhJdDuZazubhyiEihC5IitsTL2I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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