Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '99bc5133d45f1c7532ba805072e9e0dc48c08aac43826f06deef8f5988716465' 
  AND token = 'XNJr1saeiTL/einvuzfE+LCrcvF5dPP0MLIdOFmEJuI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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