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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '64032ac71677243ed81d1e4c221fa66f23ff4ab8de7ee37907d30f8ebf091445' 
  AND token = 'WbwCptVkplBLS/qLOzo5UXBxWP87AJPCU54rAb6jcPc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}