Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '408720695799f9977bad9df39b082094bb14d096ca975492a693b7a1bfd35079' 
  AND token = 'wAg9SZ1pCZ9aVkL7Dc4mOHedM0uTCRFHvCBhylVKxXs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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