Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '79ee8a5e5d6839fce66c09f66a296e622ad86cef7563aafaa574b2f8a3a95bf7' 
  AND token = 'QglzJBZMy5k1FaNA62QtKwb1n58uIfsFGbiMTXT0kEg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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