Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a1bc9ca8962c454c0f34029be0924f1c5e126cca3df1146863328356004716aa' 
  AND token = 'M90c4yKgmHNjADgxdyVoj+ZlvCqnC5gepXekXq9rurE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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