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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '3a224ddd9d325fa3b1653762434f4465dc4ef9a8f3e790c0f443336065887673' 
  AND token = 'qCFxk0rqDNeS4HL2z72lAA4MkpqD3sNo7U7jRg29N/s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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