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SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '167aa5f054b4e43e0c1728b0daaadf7f62e1adad4741ecbd94a61cf4fecb31f9' 
  AND token = 'OCk19IAtqASutESdddrXB/+3L3xt/XBcK/XV+bMkrTU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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