Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7a1450d21881219c36f0e6ab57b7fcd25e2633f17136b3fb7b9ba6bd32d6727e' 
  AND token = 'dstKmr3+eQXuVr1dzDfLbXrshncLlR7Jna5KDgx1BPA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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