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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1064b1c104d52abe1d2dc8c8fe91987e89bae9fab7ab8578b984dda3259f4af6' 
  AND token = 'hdhYWtu3BT/0Un2o8PcBPCEsaBKf99CeWOJ30N2jIUg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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