Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'adb4a7d96be39495015f508ff45089163ca656b55d4fca93b7c0be5e79c20f2f' 
  AND token = 'A3titu+PysHHLJNcoiw8megYL+oMnYuF5EP8Om+DuEk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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