Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ab70a0e9881cf3bb34b131d536bc77a36a771df39afdb71b240a18bb4b9c7bb1' 
  AND token = 'fLyEfXvrPdn2QwFpfSVFdi945BaQHI6UP3T/Rl5OzIk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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