Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '499d3d9e93c90878ebdd10d6608267f0c86b170f8df023426c014940db6ac9da' 
  AND token = 'Tgwuek44n4SNY3Td3izo8nB+wu5UjyXc7mUwajehHFQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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