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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e1d33808c271b8c4d98cff901c87d10e7e2a00bce7ddeadc8e76ac3233ec28bf' 
  AND token = 'gzKGfuQP54CqESX7SWtaZPVpP6U11VIDSwGXpsTF/U8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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