Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e0ceb7c277c98705a1a869fd21e4f4cb0e76b4d9667d429e0a07b16196284b19' 
  AND token = 'oTnFspfBQ3riI8wq3QodSPySOqs1Bmr6b5wBLnXCIMQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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