Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'feee27a8ef3a260f154bdfbcfc1b7198652153672e0fff350f550f2de66ebccf' 
  AND token = 'FS0T+moPPk6s/81ofwMgmZvjWRJAL/evb7dyv99Akgs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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