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SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = 'df4009c7d579f9a4c0b643c4aff63472102d21dd7a315e0de962c56f7fc0e358' 
  AND token = 'YWcxiaWNloPuAP6ERvfD5Ck73/tTlrGxYrPt26WzFoc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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