Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b7a6411718478deed2c72bb8f4f92ffa20eb917c36165d246c10b2f0667d1f96' 
  AND token = '8LvckwzAUD6crWUpAi3HDv+F2CJTss+zLpMXkY4tAFc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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