Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1dfb220251eab912a7ac88547baa8267ac9be8e11a5a675e6179a420b78cf4f3' 
  AND token = 'BgAh4SmfqVJlT2+wTWd+++f712euAAshxFaLzyLqrb8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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