SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd470ceb4b2e9183c82f4e62a98a70f3107ea5374f4cf8222dc55d5cda8199fef' 
  AND token = 'GTqCHi1nXhkFGl5FVBJ34Rx5KVKnKhFX9F+6Gfd5t5U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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