Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3480c50112b5f5946348c294932ba742f69fa8cb7b436acaab43b7973112533a' 
  AND token = '1Bc8sa9RslQ0Id26O4cJFF/McgTrM6f1itvQGvNExpM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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