Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1de5aa1789617e1a107aefce99b51a50689afcfe2bf46ae1fc4a8a21d8d6f22a' 
  AND token = 'iZrLws0PpKx3egBwg8/dETuZWZcMf9AnG1M6wUm4lZ4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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