Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ba899cf98dadf15bbb15197b68984e28021169690e2f40a23fc9e96426bb8650' 
  AND token = 'FktL/X3qkD++0oYpFN1nZWpZSaMUcbu/T87W9wRa45Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}