Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '35662bc119d6b336f07022085b2b8b0d8a31fdd50a533f0b4c1a0ebeebfc9fde' 
  AND token = '8nsObnUwSHTbgfTJQuAkgXWzbM19ukdu1/PZT8iszNc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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