Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '91f7af3048ba1088ba6c9b813b12f55471bc7f2cd39187254237988ba2a5b72f' 
  AND token = 'lWjbdtchSz8RfbyCjS662QcPAQb45d23NWq8uwVrWAI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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