Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ab852ec3399a38024ea0f0e17ed92a07523cdbbfe7a7cff695dfe7d1c5fed01b' 
  AND token = 'mTiZ+w6SHi6ZFKxkpABZRbon3sel28BC1JGS8RdOZgo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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