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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '25b65f26acf8d092f2880aa227f7fe707c0e5c2eaf591823eb2ceeb834fd148f' 
  AND token = 'RzBGu7Bt66HSVcx9Kfgb3CZAK8XkEmFsNknwWOwjlE0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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