Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0715de032ba0090e05d52a0a5dba0bbef25642090f13230454644bdff783179c' 
  AND token = '00DVZDoLhapxJ87zFDtoeP+lcqilfnnpQdkKxrN8MP4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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