Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '048905c57ed912e12c65f7e98da87d3c046cac2cfe9aed9ceb2070b8dd8ccea6' 
  AND token = 'k5IVb0h4QP+ifd9a5iy+stHXzn9Z2uQ0ZQJu8XDm9f4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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