Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7f33f01086f0589c61be3a7222bd28fdb98fd845216c0a3f543ff241f7b2d0cf' 
  AND token = 'G1f7NLuPNiQdey+9Dlxh8c71lNMv0aFZtWkszO6NUcQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}