Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f924f2ff62465e2f7a8f08fd5129f51902407e2c70446f2ddc018b504cb19161' 
  AND token = 'vi4zpIlk3IhN/P67KSz5mEv+c8PNFqm2OBGTaLGMS30=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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