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SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '07c57ac296eb78332ea108b4d308497cb5d202c5141155e906b0c23db31e9cb4' 
  AND token = 'X8928/5DGA2JX1ZF8QRubhzj4uFPJvCQBZnNhQTlP34=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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