Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f3c4a586a5b8ca13da5154c16de8acf46ea8a5c873687b48dfac682c8921cfdc' 
  AND token = 'Dqy5v77m8S6IxUK8qPY7jfCwPSmmPufIWEmZKd/NJIc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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