SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e9ae0b549d3828357d80fa710203fbc39af49a78fef319694af65614b94b44a1' 
  AND token = '01ZakatBGndvz/5KISi8UvhJTBLh3J6bCnU7DYi7bqE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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