Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1b0c422f85e2ed6080cb863ce33bf3471e1fe75d35057a55221a74c51b6e34bc' 
  AND token = 'lHFRE2dIgmF46C+/d0XZlgzMqa8I8dwvHm5zVX2FCvI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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