Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '05ee4ecae74e5903d25d9d622f5a93e162321128f122a8f0dd4eed9a3ceda286' 
  AND token = 'cJB24+Jtyqz7QK3IDQ+xu06SDKwsjxNwmSnFF9dLJlQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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