Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9540a634cd264a7f8ceecb9aef8c07c8fa08408b57b9ac67db735017b97fdf69' 
  AND token = 'bG4uFb1+4BoRs1ThOK756El/t2ZA9CJkgBzgRPg2G3E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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