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SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = 'd47f37601501d351a26fd15ee332a82c6d0da1b3ff14fa69ec2d4f468a2cecae' 
  AND token = 'hkq42/zMcYPVwFyBWaFD4Vudt+tEUikdx7iIgnRVsGI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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