Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aaf4b72f9538be3350e67877f9e832aacea5209a968e8d955ec4d694bb80b5f9' 
  AND token = 'fiCL5Yz8m+40KPOxXxuOqCax3/LLqSKNBrz3FEJl9So=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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