Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4dec3bb5715691437695737037c0e794675c89b67ca59b3a92f3a579554ff380' 
  AND token = 'qcdqN91ozzRlyctHoBOYunC6GV6mYABcIYMxjPMbyuM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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