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SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '2a5b434e9a6081c3fd0433c55e7d49db882bb6149374d8ff44a364cb1b33a9c4' 
  AND token = 'vg3fjLxqPdg/Al4p4X4xlNdxAWAImlrYYEkXlYxqnlg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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