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SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '049c63d339c7d92ed5a34c382544aaff4aafa2e964a6610213f25e40a63b20e8' 
  AND token = 'aOoGu3x2c7OSy4Tr0YLKv5CVmecfvlWHzsuYpODfQYc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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