Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0dd302106aad3b8de3efefaec2227b3c34918ee32ac5a9a6fcdac1d14d6942fc' 
  AND token = 'MfrnXJOqOd9lg4nlNOVP7wrDHNK4VlABBy6FWgJ5KNI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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