Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '13307b462a2a8a7e70bd89c06ce98a1f219f3074187730b1760ddd0878a6ed9e' 
  AND token = 'hJHU72l5xMqH8gYvbj4bA+MruBQeL/AX0rSuVGUGg7U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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