Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '59ebccba31a45177c21100f879423513e76919d2a29d7bbb54e1d362a7e45374' 
  AND token = 'EF84YMYnRc6rOWhq83A9yfsEw/kzyFQfz87MDfZp/+w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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