Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cedb3ae4b9f52f1e2ef6f47b0ee55093abf1678839842fdfc0e8e6639ae8f7ab' 
  AND token = 'pKE5HJnPmm67uC6kr3Zo+AenuHiSu0oruitT4Huy2zQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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