Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ee94a2274db06365d9a232dc305582326840900d2cbcc21a4dad5cc7853048b9' 
  AND token = 'ws8Tt/VndVLP/T/nKXw5cCL32XUmc1II0zLGTHOUH6E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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